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1461 Jean-Jacques (1937 YL)
Classification: Main-belt Asteroid          SPK-ID: 2001461
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 33 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .04831786305678194 4.305e-08  
a 3.125345172168052 1.6173e-08 au
q 2.974335172134062 1.3734e-07 au
i 15.31427040251308 4.8356e-06 deg
node 104.6382336814157 1.7318e-05 deg
peri 335.010001078784 5.3213e-05 deg
M 291.0113261224643 5.1769e-05 deg
tp 2458987.241436998178
(2020-May-17.74143700)
0.00029075 TDB
period 2018.112676966234
5.53
1.5665e-05
4.289e-08
d
yr
n .178384489681308 1.3847e-09 deg/d
Q 3.276355172202043 1.6955e-08 au
  Orbit Determination Parameters
   # obs. used (total)      3314  
   data-arc span      30696 days (84.04 yr)  
   first obs. used      1935-08-02  
   last obs. used      2019-08-17  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .35182  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Sep-23 19:17:47  

Additional Information
 Earth MOID = 1.99643 au 
 Jupiter MOID = 1.90212 au 
 T_jup = 3.158 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 10.01   n/a IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 8
diameter diameter 35.145 km 0.172 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
rotation period rot_per 16.56 h n/a LCDB (Rev. 2019-January); Warner et al., 2009 Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Behrend, R. (2005) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
geometric albedo albedo 0.172   0.030 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
B-V BV 0.715   0.018 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=3; phase (min.=5.09, mean=9.76, max.=19.07) deg.
U-B UB 0.210   0.035 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=3; phase (min.=5.09, mean=9.76, max.=19.07) deg.
Tholen spectral type spec_T M   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 7 color indices; used ground-based radiometric albedo

1461 Jean-Jacques (1937 YL)          Discovered 1937-Dec-30 by Laugier, M. at Nice
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 1937 YL = 1935 OH = 1939 GH 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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